A study of the effect of television commercials on 12-year-oldchildren measured their attention span, in seconds. The commercialswere for clothes, food, and toys.
Clothes Food Toys
| 43 | 30 | 52 |
| 24 | 38 | 58 |
| 42 | 46 | 43 |
| 35 | 54 | 49 |
| 28 | 47 | 63 |
| 31 | 42 | 53 |
| 17 | 34 | 48 |
| 31 | 43 | 58 |
| 20 | 57 | 47 |
| 47 | 51 |
| 44 | 51 |
| 54 | |
a. Complete the ANOVA table using a .05 significance level(Round the SS and MS values to 1 decimal place andF value to 2 decimal places. Leave no cells blank — becertain to enter \"0\" wherever required. Round the df values tonearest whole number.)
b. Find the values of mean and standarddeviation. (Round the mean and standard deviation values to3 decimal places.)
c. Is there a difference in the mean attentionspan of the children for the various commercials?
|
| | Thehypothesis of identical means can definitely be (Rejected or NotRejected) | | . | Thereis | | (Adifference, No difference) in the mean attention span. |
|
d.
Are there significant differences between pairs of means?
|
| | Clotheshave a mean attention span of at least ten minutes (Above orBelow) | | the othergroups. |
|
